Video Tools
Video Speed Changer
Speed up or slow down videos from 0.25x to 4x with audio pitch preservation.
Your files stay on your device - processed locally via WebAssembly, never uploaded
Drop a video file or click to upload
MP4, WebM, MOV
Your videos are processed locally. Nothing is uploaded.
Embed this tool on your website
Copy this code to add the Video Speed Changer to your site for free. It runs entirely in your visitors' browsers - no API key, no usage limits.
<iframe src="https://optipix.art/embed/video-speed" width="100%" height="600" style="border:1px solid #e4e4e7;border-radius:8px;" title="Video Speed Changer by OptiPix" loading="lazy"></iframe> <p style="font-size:12px">Free tool by <a href="https://optipix.art/video-speed">OptiPix Video Speed Changer</a></p>
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About Video Speed Changer
Last updated: May 2026
Penukar Kelajuan Video OptiPix melaraskan kelajuan main balik video daripada 0.25x (gerakan perlahan) kepada 4x (selang masa) terus dalam penyemak imbas anda. Kelajuan audio dilaraskan dengan pemeliharaan nada menggunakan penapis atempo. Pilihan untuk membisukan audio untuk perubahan kelajuan senyap. Menggunakan penapis FFmpeg.wasm setpts dan atempo.
How It Works
Video: setpts={1/speed}*PTS. Audio: penapis atempo (dirangkai untuk kelajuan di luar julat 0.5-2.0) untuk memelihara nada.
Use Cases
- •Cipta kesan gerakan perlahan
- •Cepatkan tutorial
- •Cipta selang masa daripada video
- •Cepatkan rakaman pengawasan
- •Perlahankan ulangan sukan
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If you find Video Speed Changer useful, check out these related tools: Video Trimmer, Audio Speed Changer, and Reverse Video. All tools run entirely in your browser with no uploads or signups required.
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